| 摘要 |
PURPOSE:To realize recording at high articulation by providing a level control circuit to execute the level control of a sound received from a mobile unit and executing the output addition of a second level control circuit to execute the level control of a sound transmitted from a microphone. CONSTITUTION:In the internal part of a speaker unit 2, a first level control circuit 25 is provided to execute the level control of the sound received from a mobile unit 1, second level control circuit 26 is provided to execute the level control of the sound transmitted from a microphone 4, adding amplifier 21 is provided to add the outputs of the first and second level control circuits 25 and 26, and output terminal 22 is provided to output an added result form the adding amplifier 21 to an external part. Since the added result is outputted from the output terminal 22 to the external part, the contents of a call can be recorded and monitored. In such a way, the output from the output terminal 22 is defined as the input of a tape recorder 5. Thus, recording is realized at the high articulation. |
